remove unused file
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bf33382082
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/*
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* SPDX-FileCopyrightText: syuilo and misskey-project
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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export interface IMaybe<T> {
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isJust(): this is IJust<T>;
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}
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export interface IJust<T> extends IMaybe<T> {
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get(): T;
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}
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export function just<T>(value: T): IJust<T> {
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return {
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isJust: () => true,
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get: () => value,
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};
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}
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export function nothing<T>(): IMaybe<T> {
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return {
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isJust: () => false,
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};
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}
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@ -1,23 +0,0 @@
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/*
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* SPDX-FileCopyrightText: syuilo and misskey-project
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* SPDX-License-Identifier: AGPL-3.0-only
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*/
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import * as assert from 'assert';
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import { just, nothing } from '../../src/misc/prelude/maybe.js';
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describe('just', () => {
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test('has a value', () => {
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assert.deepStrictEqual(just(3).isJust(), true);
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});
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test('has the inverse called get', () => {
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assert.deepStrictEqual(just(3).get(), 3);
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});
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});
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describe('nothing', () => {
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test('has no value', () => {
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assert.deepStrictEqual(nothing().isJust(), false);
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});
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});
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